Friends of the Earth's food campaigner Kirtana Chandrasekaran said consumers were largely unaware of the extent of both GM and nano in food.

'It is a big hole in the labelling legislation, and in the case of GM most of what currently comes into the EU is animal feed. Consumers should be given the freedom of choice,' she said.

Both decisions will now need to be approved by the European Council, which has previously rejected the proposals on GM labelling. However, with MEPs voting a second time in favour of tougher rules on GM and nano, observers say the Council is likely to face pressure to reach a compromise.

Cloning

The Council will also have to decide on further regulations after MEPs voted in favour of measures to ban food derived from cloned animals.

'There is a high likelihood that consumers will be served products from cloned animals or their offspring without their knowledge,' said report author Christoph Then. 'There is no transparency for consumers and farmers.'

The Council is expected to decide on whether to accept the EU Parliament's decision by July.